<template>
    <div class="wrapper">
        <!--header-->
        <header>
            <p>商家列表</p>
        </header>
        <!--商家列表-->
        <ul class="business">
            <li v-for="item in businessArr" @click="toBusinessInfo(item.businessId)">
                <div class="left">
                    <img :src="item.businessImg">
                    <div class="quantity" v-show="item.quantity>0">{{ item.quantity }}</div>
                </div>
                <div class="right">
                    <h3>{{ item.businessName }}</h3>
                    <p>&#165;{{ item.startPrice }}起送 | &#165;{{ item.deliveryPrice }}配送</p>
                    <p>{{ item.businessExplain }}</p>
                </div>
            </li>
        </ul>
        <!--底部菜单部分-->
        <Footer></Footer>
    </div>
</template>

<script>
import Footer from "@/components/Footer";
import {useRoute, useRouter} from 'vue-router'

let router, route

export default {
    name: 'BusinessList',
    data() {
        route = useRoute()
        return {
            orderTypeId: route.query.orderTypeId - 0,
            businessArr: [],
            user: {}
        }
    },
    created() {
        router = useRouter()
        this.user = this.$getSessionStorage('user');
        //发现和查询某个食品类别的商家复用这个页面
        //orderTypeId=-1代表发现
        if (this.orderTypeId === -1) {
            let url = `business/random/5`
            this.$axios.get(url).then(response => {
                this.businessArr = response.data.data;
                //判断是否登录
                if (this.user != null) {
                    this.listCart();
                }

            }).catch(error => {
                console.error(error);
            });
        } else {
            //根据orderTypeId查询商家信息
            let url = `business`;
            this.$axios.get(url, {
                params: {
                    orderTypeId: this.orderTypeId
                }
            }).then(response => {
                this.businessArr = response.data.data;
                //判断是否登录
                if (this.user != null) {
                    this.listCart();
                }

            }).catch(error => {
                console.error(error);
            });
        }
    },
    components: {
        Footer
    },
    methods: {
        listCart() {
            let url = `cart/${this.user.userId}`;
            this.$axios.get(url).then(response => {
                let cartArr = response.data.data;
                //遍历所有食品列表
                for (let businessItem of this.businessArr) {
                    businessItem.quantity = 0;
                    for (let cartItem of cartArr) {
                        if (cartItem.businessId === businessItem.businessId) {
                            businessItem.quantity += cartItem.quantity;
                        }
                    }
                }
                this.businessArr.sort();
            }).catch(error => {
                console.error(error);
            });
        },
        toBusinessInfo(businessId) {
            router.push({name: 'BusinessInfo', query: {businessId}});
        }
    }
}
</script>

<style scoped>
/**************************总容器**************************/
.wrapper {
    width: 100%;
    height: 100%;
}

/**************************header**************************/
.wrapper header {
    width: 100%;
    height: 12vw;
    background-color: #0097FF;
    color: #FFF;
    font-size: 4.8vw;

    position: fixed;
    left: 0;
    top: 0;
    z-index: 1000;

    display: flex;
    justify-content: center;
    align-items: center;
}

/**************************商家列表**************************/
.wrapper .business {
    width: 100%;
    margin-top: 12vw;
}

.wrapper .business li {
    width: 100%;
    box-sizing: border-box;
    padding: 2.5vw;
    border-bottom: solid 1px #DDDDDD;
    user-select: none;

    display: flex;
    align-items: center;
}

.wrapper .business .left {
    position: relative
}

.wrapper .business .left img {
    width: 20vw;
    height: 20vw;
}

.wrapper .business .left .quantity {
    width: 5vw;
    height: 5vw;
    background-color: red;
    color: #fff;
    font-size: 3.6vw;
    border-radius: 2.5vw;

    display: flex;
    justify-content: center;
    align-items: center;

    position: absolute;
    right: -1.5vw;
    top: -1.5vw;
}

.wrapper .business .right {
    margin-left: 3vw;
}

.wrapper .business h3 {
    font-size: 3.8vw;
    color: #555;
}

.wrapper .business p {
    font-size: 3vw;
    color: #888;
    margin-top: 2vw;
}
</style>